Snowballed

When you consider how Apple stock has snowballed massively over the last few years (over 6,000 per cent since Steve Jobs returned to the company in 1997), Cook's tenure at Apple is likely to make him a billionaire.

New Chairman of the Board Steve Jobs currently owns 5.5 million shares, which would be worth over $2bn if he decided to cash them in and buy a desert island to retire to.